panel/app/Models/ServerVariable.php

<?php

namespace App\Models;

use App\Contracts\Validatable;
use App\Traits\HasValidation;
use Carbon\CarbonImmutable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

/**
 * @property int $id
 * @property int $server_id
 * @property int $variable_id
 * @property string $variable_value
 * @property CarbonImmutable|null $created_at
 * @property CarbonImmutable|null $updated_at
 * @property EggVariable $variable
 * @property Server $server
 */
class ServerVariable extends Model implements Validatable
{
    use HasValidation;

    /**
     * The resource name for this model when it is transformed into an
     * API representation using fractal.
     */
    public const RESOURCE_NAME = 'server_variable';

    protected $guarded = ['id', 'created_at', 'updated_at'];

    /** @var array<array-key, string[]> */
    public static array $validationRules = [
        'server_id' => ['required', 'int'],
        'variable_id' => ['required', 'int'],
        'variable_value' => ['string'],
    ];

    protected function casts(): array
    {
        return [
            'server_id' => 'integer',
            'variable_id' => 'integer',
            'created_at' => 'immutable_datetime',
            'updated_at' => 'immutable_datetime',
        ];
    }

    /**
     * Returns the server this variable is associated with.
     */
    public function server(): BelongsTo
    {
        return $this->belongsTo(Server::class);
    }

    /**
     * Returns information about a given variables parent.
     */
    public function variable(): BelongsTo
    {
        return $this->belongsTo(EggVariable::class, 'variable_id');
    }
}